Washington, March 26 -- In a surprise crossover development, the upcoming 'The Super Mario Galaxy Movie' has officially added Fox McCloud to its roster, intensifying speculation that a larger 'Super Smash Bros.' cinematic universe may be in the works.

The announcement, made on Thursday, confirms long-standing fan theories that the iconic space pilot from Nintendo's 'Star Fox' franchise would appear in the film.

No voice actor has yet been revealed for the character.

Fox McCloud debuted in the 1993 action-adventure title 'Star Fox' on the Super Nintendo Entertainment System and has since headlined multiple entries, including 'Star Fox 64,' 'Star Fox Adventures,' and 'Star Fox: Assault.'

His most recent appearance was in 2017's 'Star Fo...